Semiclassical analysis of polarization effects in collision-induced intramultiplet mixing for Ne/(2p)/sup 5/(3p)/+ He

Journal Article · Mon May 01 04:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.4467· OSTI ID:6320692

Manders, M P.I.; van Hoek, W B.M.; Vredenbregt, E J.D.; Sandker, G J; Beijerinck, H C.W.; Verhaar, B J

We have performed new crossed-beam measurements and quantum-mechanical calculations on transitions between the short-lived Ne/sup *//sup *//(2p)/sup 5/(3p)//sub k/equivalent//alpha///sub k/ states with k = 4,5,6,7 (Paschen numbering), induced by collisions with ground-state He atoms at energies between 70 and 140 meV. The //alpha///sub 4,5,6,7/ multiplet is distinguished by the presence of several avoided crossings between the adiabatic potentials V/sub k//sup ..cap omega../(R): a sign of strong, localized radial coupling. This has inspired a simple, semiclassical model for the Ne/sup *//sup */-He collision process, which has the following ingredients: (i) straight-line trajectories with hard-sphere scattering at the classical turning point R/sub T/; (ii) rotational coupling for R>R/sub L/ and ''locking'' of the electronic angular momentum J to the internuclear axis for Rless than or equal toR/sub L/, with R/sub L/ the locking radius; (iii) Landau-Zener--type curve-crossing transitions near the crossing radius R/sub C/.

• Research Organization: Physics Department, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
• OSTI ID: 6320692
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 39:9; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
BEAM DYNAMICS
BEAM-BEAM INTERACTIONS
BEAMS
COLLIDING BEAMS
COLLISIONS
CONFIGURATION MIXING
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EV RANGE
EXCITED STATES
FLUIDS
GASES
GROUND STATES
HELIUM
INTERACTIONS
MILLI EV RANGE
MULTIPLETS
NEON
NONMETALS
POLARIZATION
RARE GASES
TRANSIENTS